'Pera' sweet orange trees budded either on mandarins or mandarin-hybrids rootstocks were planted in 1988 at 4.25m x 7.5m spacing on a sandy textured Oxisol in Sao Paulo state, Brazil, under Cwa climatic conditions, and managed without irrigation. Tristeza and blight diseases are endemic in the area. Trees on Africa do Sul, Xienkhouanga, Empress, Cleopatra, Wildt and 117.477 cultivars, produced the highest cumulative yields in the first four crops and in the ninth crop. Regardless of the rootstock tested no significant variation on fruit quality was observed, but 'Cleopatra' mandarin induced earlier maturation of fruit than the others roostocks. Only 'Szwinkon' x 'Szinkon-tizon' rootstocks induced dwarfed trees. 'Xienkhouanga', 117.477, 'Africa do Sul', 'Cleopatra', 'Empress', 'Wildt' and 'Szinkon' x 'Tizon' induced the highest fruit and soluble solids production by tree in the 1996-1999 period. No one trees showed symptoms of tristeza, declinio/blight or bud-union-ring symptom of incompatibility.
Citrus reshni; C. reticulata; blight; tristeza
